Various forms of server-side rendering for JavaScript-heavy webapps are definitely picking up steam, but I don't see how they will gain popularity among the lon

Various forms of server-side rendering for JavaScript-heavy webapps are definitely picking up steam, but I don't see how they will gain popularity among the long tail of web developers because of one thing: cost. Simply put a client-side SPA is much cheaper to run than almost anything else because you're pushing as much computation as possible onto the client where you don't pay for it. You just need a good static host with a CDN like Netlify, Firebase, etc which is nearly free (for small sites, completely free). Developers who have tried this are not keen to go back to paying for servers to do this computation. Big companies can and will pay for this cost to improve user experience (see: Next.js popularity) but I just think a lot of solo hackers will shy away from it and that will affect momentum. This isn't really a critique of the technique one way or the other, just a prediction of how far the trend can go.